Floaters: When to Worry About Eye Health Issues - Ophthalmology

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The appearance of clusters of black spots in the field of vision?


Hello, doctor! Three years ago, I underwent laser treatment on my right eye.
Two weeks ago, I noticed seven small black spots that resembled floaters in my right eye, so I went to the hospital for a check-up on my retina and vitreous.
The examination indicated a suspected vitreous detachment in my right eye, but there were no new retinal tears.
However, a few days later, the number of black spots suddenly increased to over twenty, forming clusters.
I then visited a well-known ophthalmologist for further evaluation, and they confirmed that there were no retinal tears.
I also experience flashes of light when I blink in bright conditions or under a blue sky.
As of today, the number of black spots has increased to over thirty, and I feel a wavy sensation in a specific area of my vision in bright light, although I no longer see flashes in dim light, only occasional brief flashes.

My question is: can prolonged blinking for two consecutive days lead to the immediate formation of retinal tears? I read in the literature that with posterior vitreous detachment, when new floaters appear, there is a 20% chance of developing a tear, and within a week, 2-5% may develop new tears.
However, it has been two weeks, and I have not had any tears.
Given this, what is the likelihood of developing a tear within the next three months?

Xun Xun, 20~29 year old female. Ask Date: 2020/10/27

Dr. He Jianxian reply Ophthalmology


Hello, Xun Xun: Blinking does not cause retinal tears.
Based on my clinical experience, most floaters do not accompany the formation of tears, so I cannot provide a definitive answer to your question regarding probability.
Director He Jianxian, Ophthalmology, Nantou Hospital.

Reply Date: 2020/10/27

More Info


When it comes to floaters in the eye, particularly in the context of your recent experiences, it’s essential to understand the nature of these visual disturbances and when they might indicate a more serious issue. Floaters are typically small specks or strands that drift through your field of vision, often more noticeable against a bright background. They are usually caused by changes in the vitreous gel that fills the eye, which can occur as part of the natural aging process or due to other factors such as high myopia (nearsightedness), trauma, or previous eye surgeries.

Given your history of laser treatment in your right eye and the recent increase in floaters, it’s understandable to be concerned about the potential for retinal issues. The fact that you have experienced a sudden increase in the number of floaters, especially in conjunction with flashes of light (photopsia), can be indicative of vitreous detachment. While vitreous detachment itself is not uncommon and often benign, it can sometimes lead to more serious complications, such as retinal tears or detachments.

You mentioned that your right eye has been checked for retinal holes and that no new holes were found, which is reassuring. However, the increase in floaters and the sensation of water ripples in your vision are symptoms that warrant careful monitoring. The literature you referenced indicates that there is a risk of retinal tears following vitreous detachment, particularly in the first few weeks after the event. The statistics you cited suggest a 20% chance of developing a tear when new floaters appear, with a 2-5% risk of new tears forming within the first week. Since it has been two weeks since your initial symptoms, while the risk may decrease over time, it does not disappear entirely.

As for your question about whether continuous blinking for two days could lead to a retinal tear, it is unlikely that such an action alone would cause a tear. Retinal tears are typically associated with the mechanical forces exerted on the retina during sudden movements or trauma, rather than from normal eye movements like blinking. However, if you are experiencing discomfort or a significant change in your vision, it is crucial to consult your eye care professional promptly.

In terms of your concern about the likelihood of developing a retinal tear within the next three months, it is difficult to provide a precise percentage without a thorough examination and understanding of your specific eye health. Generally, if no tears have developed after two weeks, the risk may decrease, but it is still essential to remain vigilant for any new symptoms, such as increased floaters, flashes of light, or changes in peripheral vision.

To manage your anxiety regarding these symptoms, consider the following steps:
1. Regular Eye Exams: Continue to have regular check-ups with your eye doctor, especially if you notice any changes in your vision. This will help monitor your condition and catch any potential issues early.

2. Avoid Strain: While it’s important to maintain normal activities, try to avoid eye strain by taking regular breaks when using screens or reading.

3. Stay Informed: Educate yourself about the symptoms of retinal detachment and when to seek immediate medical attention. Symptoms to watch for include a sudden increase in floaters, flashes of light, or a shadow or curtain effect in your peripheral vision.

4. Manage Anxiety: If your anxiety about your eye health is overwhelming, consider speaking with a mental health professional. They can help you develop coping strategies to manage your worries.

In summary, while the presence of floaters and flashes can be concerning, especially following a history of eye surgery, it is crucial to maintain open communication with your eye care provider and monitor your symptoms closely. Regular check-ups and being aware of changes in your vision will help ensure your eye health is managed effectively.

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